Study of the structural, dielectric and magnetic properties of Bi2O3 and PbO addition on BiFeO3 ceramic matrix

被引：69
作者：
Rodrigues, H. O. [1 ,2 ]
Pires Junior, G. F. M. [1 ,2 ]
Almeida, J. S. [1 ]
Sancho, E. O. [3 ]
Ferreira, A. C. [1 ,2 ]
Silva, M. A. S. [1 ]
Sombra, A. S. B. [1 ]
机构：
[1] Lab Telecomunicacoes & Ciencia & Engn Mat LOCEM, BR-60455760 Fortaleza, Ceara, Brazil
[2] Univ Fed Ceara, Dept Engn Teleinformat, BR-60755640 Fortaleza, Ceara, Brazil
[3] Univ Fed Ceara, Dept Met & Mat Engn, BR-60455760 Fortaleza, Ceara, Brazil
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2010年 / 71卷 / 09期
关键词：
Inorganic compounds; Electrical properties; ROOM-TEMPERATURE; DIFFRACTION; NUCLEAR;
D O I：
10.1016/j.jpcs.2010.05.016
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this paper we studied the effects of Bi2O3 and PbO addition on BiFeO3 (BFO) ceramic matrix. The structural, dielectric and magnetic properties of fifteen BFO samples were discussed in view of possible applications in RF and microwave devices. The present work also reports the preparation of the samples. Polyvinyl alcohol (PVA) and tetraethyl orthosilicate (TEOS) were also added as a binder in the fabrication procedure. The samples have been studied by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and magnetic hysteresis measurements. Further, a study based on impedance spectroscopy also has been done. Dielectric permittivity (epsilon') and dielectric loss (tan delta) were measured at room temperature in the frequency range 100 Hz-10 MHz, as well as a.c. conductivity. The -Im[Z(f)] versus Re[Z(f)] plot has been obtained. The samples were investigated in view of possible applications like miniaturized filters, diplexers and dielectric resonator antennas (DRA). In the RF and MW frequency region, the application of magneto-dielectric and multiferroic perovskite composite materials is desirable for the miniaturization of components. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：1329 / 1336
页数：8
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